:root{--ink:#24364b;--navy:#1e476d;--muted:#465b6c;--paper:#f7f4ee;--surface:#fffdfa;--mist:#edf2f4;--line:#ced8dd;--accent:#ac5d3a;--green:#44735e;--serif:"Songti SC",STSong,SimSun,Georgia,serif;--sans:"Segoe UI","Helvetica Neue",Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{margin:0;min-width:320px;background:var(--paper);color:var(--ink);font:17px/1.6 var(--sans)}a{color:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}.skip{position:fixed;z-index:99;top:8px;left:8px;padding:10px 16px;transform:translateY(-160%);background:var(--navy);color:#fff}.skip:focus{transform:none}
.masthead{position:sticky;z-index:20;top:0;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;min-height:76px;padding:0 max(28px,calc((100vw - 1240px)/2));border-bottom:1px solid var(--line);background:rgba(247,244,238,.94);backdrop-filter:blur(14px)}.brand{display:flex;width:max-content;align-items:center;gap:11px;text-decoration:none}.brand img{width:40px;height:40px;object-fit:contain}.brand strong{font:800 23px/1 var(--sans);letter-spacing:-.025em}.masthead nav{display:flex;gap:32px}.masthead nav a,.source-link{text-decoration:none;font-size:15px;font-weight:700}.masthead nav a{color:var(--muted)}.masthead nav a:hover,.source-link:hover{color:var(--accent)}.source-link{justify-self:end;border-bottom:1px solid currentColor;padding:6px 0}
.eyebrow{margin:0 0 17px;color:var(--accent);font:800 13px/1.35 var(--sans);letter-spacing:.12em}.hero,.intro-band,.case-section,.limits-section{max-width:1240px;margin:auto;padding-right:28px;padding-left:28px}.hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(440px,.82fr);gap:70px;align-items:center;padding-top:99px;padding-bottom:105px}.hero h1{margin:0 0 27px;font:700 clamp(52px,5.4vw,79px)/1.06 var(--serif);letter-spacing:-.045em;text-wrap:balance}.hero h1 em{color:var(--accent);font-style:normal}.lead{max-width:660px;margin:0;color:var(--muted);font-size:19px;line-height:1.7}.lead strong{color:var(--ink)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:31px}.button{display:inline-flex;min-height:48px;align-items:center;justify-content:center;gap:10px;padding:10px 19px;border:1px solid var(--navy);border-radius:9px;font-size:16px;font-weight:750;text-decoration:none;transition:background .2s,color .2s,transform .2s}.button:hover{transform:translateY(-2px)}.button.primary{color:#fff;background:var(--navy)}.button.primary:hover{background:#285b83}.button.secondary{color:var(--navy);background:transparent}.button.secondary:hover{background:#e7eef1}.scope-line{margin:23px 0 0;color:var(--muted);font-size:15px}
.hero-diagram{overflow:hidden;border:1px solid #adc0ca;border-radius:19px;background:var(--surface);box-shadow:0 28px 65px rgba(33,65,90,.11)}.diagram-head{display:flex;justify-content:space-between;gap:12px;padding:21px 26px;border-bottom:1px solid var(--line);background:#eef4f6}.diagram-head span{color:var(--accent);font:800 13px/1.3 var(--sans);letter-spacing:.1em}.diagram-head b{font-size:14px}.diagram-stage,.diagram-core{display:grid;grid-template-columns:38px 1fr;align-items:center;gap:17px;min-height:80px;margin:0 25px;padding:15px 0}.diagram-stage+.diagram-stage,.diagram-core+.diagram-stage{border-top:1px solid var(--line)}.stage-num{display:grid;width:38px;height:38px;place-items:center;border-radius:9px;background:#e2edf2;color:var(--navy);font-size:13px;font-weight:800}.diagram-stage b,.diagram-core b{display:block;font:700 21px/1.2 var(--serif)}.diagram-stage small,.diagram-core small{display:block;margin-top:4px;color:var(--muted);font:15px/1.4 var(--sans)}.diagram-core{position:relative;grid-template-columns:38px 1fr 16px;min-height:94px;margin:0;padding:17px 25px;color:#fff;background:var(--navy)}.diagram-core .stage-num{color:#fff;background:#4e7191}.diagram-core small{color:#e4edf4}.core-pulse{width:11px;height:11px;border-radius:50%;background:#78c7a1;box-shadow:0 0 0 5px rgba(120,199,161,.17)}.diagram-channels{display:flex;flex-wrap:wrap;gap:8px;padding:18px 25px;border-top:1px solid var(--line);background:#f3f7f7}.diagram-channels span{padding:5px 9px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--navy);font:800 12px/1.25 var(--sans)}
.intro-band{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding-top:70px;padding-bottom:77px;border-top:1px solid var(--line)}h2{margin:0;font:700 clamp(39px,4vw,55px)/1.14 var(--serif);letter-spacing:-.035em;text-wrap:balance}.intro-copy p{margin:0 0 18px;color:var(--muted);font-size:18px;line-height:1.72}.intro-copy p:last-child{margin-bottom:0}.case-section{padding-top:100px;padding-bottom:110px;border-top:1px solid var(--line)}.section-heading{display:grid;grid-template-columns:1fr .8fr;align-items:end;gap:70px;margin-bottom:40px}.section-heading>p{margin:0;color:var(--muted);font-size:18px;line-height:1.65}.case-status{margin:0 0 20px;color:var(--muted);font-size:16px}.case-status:empty{display:none}.windows-grid{display:grid;gap:34px}
.window-case{overflow:hidden;display:grid;grid-template-columns:minmax(0,1.1fr) minmax(360px,.9fr);border:1px solid var(--line);border-radius:18px;background:var(--surface);box-shadow:0 14px 45px rgba(34,62,80,.05)}.case-media{display:flex;min-width:0;flex-direction:column;background:#eaf1f4}.case-media video{display:block;width:100%;aspect-ratio:16/9;object-fit:contain;background:#101a22}.media-caption{display:flex;justify-content:space-between;gap:12px;padding:12px 18px;color:var(--muted);font-size:13px}.case-detail{padding:31px 34px 26px}.case-id{margin:0 0 10px;color:var(--accent);font-size:13px;font-weight:800;letter-spacing:.1em}.case-detail h3{margin:0 0 12px;font:700 30px/1.2 var(--serif);letter-spacing:-.02em}.case-summary{margin:0 0 18px;color:var(--muted);font-size:16px;line-height:1.55}.app-list{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:25px}.app-list span{padding:5px 10px;border:1px solid var(--line);border-radius:7px;background:#f1f6f7;color:var(--navy);font-size:13px;font-weight:750}.case-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin:0 0 23px}.case-metrics div{min-width:0;padding:10px 7px;border-top:2px solid var(--line)}.case-metrics dt{color:var(--muted);font-size:12px;line-height:1.25}.case-metrics dd{margin:4px 0 0;color:var(--navy);font:800 27px/1.1 var(--serif)}.mix-head{display:flex;justify-content:space-between;gap:10px;margin:0 0 10px;font-size:14px}.mix-head b{color:var(--navy)}.mix-head span{color:var(--muted)}.mix-track{display:flex;overflow:hidden;height:13px;border-radius:20px;background:var(--mist)}.mix-track span{height:100%;min-width:2px}.mix-track span+span{border-left:2px solid #fff}.mix-legend{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:12px}.mix-legend span{display:flex;align-items:center;gap:6px;color:var(--muted);font-size:13px}.mix-legend i{width:9px;height:9px;border-radius:2px}.step-drawer{grid-column:1/-1;border-top:1px solid var(--line)}.step-drawer summary{min-height:57px;display:flex;align-items:center;justify-content:space-between;gap:15px;padding:12px 24px;cursor:pointer;color:var(--navy);font-weight:750;list-style:none}.step-drawer summary::-webkit-details-marker{display:none}.step-drawer summary::after{content:"+";font-size:25px;line-height:1}.step-drawer[open] summary::after{content:"−"}.step-drawer ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 24px;margin:0;padding:8px 34px 27px 58px}.step-drawer li{padding:7px 8px;border-bottom:1px solid var(--line);font-size:14px}.step-drawer li::marker{color:var(--accent);font-weight:800}.step-drawer li b{color:var(--navy)}.step-drawer li span{color:var(--muted)}.case-method{max-width:940px;margin:31px 0 0;color:var(--muted);font-size:15px;line-height:1.6}
.limits-section{display:grid;grid-template-columns:.8fr 1.2fr;gap:65px;padding-top:85px;padding-bottom:120px;border-top:1px solid var(--line)}.limit-grid{display:grid;gap:12px}.limit-grid article{padding:22px 23px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.limit-grid article span{color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.limit-grid h3{margin:5px 0;font:700 23px/1.22 var(--serif)}.limit-grid p{margin:0;color:var(--muted);font-size:15px}.archive-link{grid-column:2;justify-self:start;margin-top:8px;color:var(--navy);font-weight:750;text-underline-offset:5px}footer{display:flex;justify-content:space-between;gap:20px;padding:26px max(28px,calc((100vw - 1184px)/2));border-top:1px solid var(--line);color:var(--muted);font-size:14px}footer a{text-decoration:none}footer a:hover{text-decoration:underline}
@media(max-width:1050px){.masthead{grid-template-columns:1fr auto;padding:0 24px}.masthead nav{display:none}.hero{grid-template-columns:1fr;gap:44px;padding-top:72px}.hero-diagram{max-width:650px}.window-case{grid-template-columns:1fr}.case-media video{aspect-ratio:16/9}.case-detail{padding:28px}.limits-section{grid-template-columns:1fr}.archive-link{grid-column:1}}
@media(max-width:650px){body{font-size:16px}.masthead{min-height:65px;padding:0 18px}.brand img{width:34px;height:34px}.brand strong{font-size:20px}.source-link{font-size:13px}.hero,.intro-band,.case-section,.limits-section{padding-right:18px;padding-left:18px}.hero{padding-top:55px;padding-bottom:66px}.hero h1{font-size:clamp(43px,10vw,61px)}.lead{font-size:17px}.hero-actions{align-items:stretch;flex-direction:column}.hero-diagram{width:100%}.diagram-head{padding:17px}.diagram-head b{display:none}.diagram-stage{margin:0 17px}.diagram-core{padding:13px 17px}.intro-band,.section-heading{grid-template-columns:1fr;gap:18px}.intro-band{padding-top:60px;padding-bottom:60px}.case-section{padding-top:70px;padding-bottom:75px}.case-detail{padding:24px 18px}.case-metrics{grid-template-columns:repeat(2,1fr);gap:7px 15px}.step-drawer ol{grid-template-columns:1fr;padding:5px 18px 22px 44px}.media-caption{font-size:12px}.limits-section{padding-top:65px;padding-bottom:80px}footer{flex-wrap:wrap;padding:24px 18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}
.eyebrow,.case-id,.diagram-head span,.limit-grid article span{font-size:14px}
.diagram-head b,.diagram-channels span,.media-caption,.app-list span,.case-metrics dt,.mix-legend span{font-size:14px}
.step-drawer li{font-size:15px}
.case-method summary{cursor:pointer;color:var(--navy);font-weight:750}.case-method p{margin:10px 0 0}
@media(max-width:650px){.media-caption{font-size:14px;flex-wrap:wrap}}